Balance demonstrating device



Dec. 20, 1949 HI D E R 2,492,066

BALANCE DEMONS TRATING DEVI CE Filed Oct. 25, 1947 INVENTOR. /'7'/V/?) 6'. 5pm ONE/5K.

Patented Dec. 20, 1949 A E N T 1 F ICE 2,492,066 BALANCE DEMQNSTEATINQ DEVIQE lfilenryfl. ,Schildineier, Indianapolis, Ind. Application qctober z3, 19 47, serialNo. 781 670 M (c1. s i '7 =1 Qleims- :1 This invention relatesito a .device for demonstrating static and dy'namic balance. and. unbalance in rotating bodies.

The chief object of the present invention is to provide a support for a circular rotatable mass and selectively, associate. therewith a plurality of small mass members for visually indiciating states and kinds of unbalance and co mbinations thereof and the princ'iplesof correction for same.

The, chief feature of the present inventionrede i b eed n .e upper with e el y tatable circular mass of appreciable amount, and

substantially symmetrical, and with a plurality .o w h e h. em sili ar rise l idi posed, certain of the opposed sockets being longitudinally aligned.

Another feature of the invention resides in having the aligned sockets comprising continuations of each other.

A further feature of the invention resides in having the sockets threaded to take threaded stems of the small mass members, and selectively and interchangeably.

Other objects and features of the invention will be set forth more fully hereinafter.

The full nature of the invention will be understood from the accompanying drawings and the following description and claims.

In the drawings:

Fig. l is a perspective view of one embodiment of the invention showing two of the small mass members in diagonally disposed relation.

Fig. 2 is a central sectional view through the same.

Fig. 3 is an elevational view of the device with two of the members diametrally disposed.

Fig. a is a similar view with two of the members disposed oppositely and in longitudinally aligned relation.

In the drawings I0 indicates a spindle or the like which can be grasped and held in one hand, see dotted lines Fig. 1. It is stepped as at H and the end is slotted as at l2. Mounted thereon is the bearing l3 centrally disposed in the symmetrical circular, relatively large mass I The slot provides for spindle-bearing retention against axial separation. Bearing 13 may be of anti-friction character so that mass I4 is readily rotatable about the spindle axis.

Herein the periphery [5 of said mass includes considerable concentration so that when the mass is rotated the effect of centrifugal force, etc., is emphasized.

Disposed in diametral relation and in imme- At' least'two' substa'nti member's aieprovi'dcd "ber comprises .a threaded (st d gi s. prox m y t pe i her 15ers ha iltseqs qle .16. th axe Q which ar par lle l ether an th a i ,o tat n- Ihi stantial'lybalanced type.

"jll, affint diate" pol gonal portionflc l9. shoumer zo seating ofthe stem W n member d to. the ci cu a body a can be revolved stair-the spindle aids and the body is substantially in dynamic and static balance.

When one member is applied to the body the result is there is present both dynamic and static unbalance and the body has both a wobble and hopping combined action.

When a second member is applied directly opposite the first member, see Fig. 4, the result is that the body is dynamically but not statically balanced so that rotation includes a hopping action.

When a second member is applied diagonally opposite, see Figs. 1 and 2, the structure is statically balanced but dynamically unbalanced and the rotation includes a wobble action.

When a second member is applied diametrically opposite and on the same side, see Fig. 3, the body is both dynamically and statically balanced and the rotation is true, that is, without wobble or hopping action.

A device of this type with a spindle one quarter by four or so inches and a body of approximately three inches in diameter by a half inch or so at its thickest part very effectively and visually demonstrates unbalance and proper balancing such as found in bent or damaged vehicle wheels and rims and by virtue of unbalanced tires, etc., thereon.

While the invention has been illustrated and described in great detail in the drawings and foregoing description, the same is to be considered as illustrative and not restrictive in character.

The several modifications described herein as well as others which will readily suggest themselves to persons skilled in this art, all are considered to be within the broad scope of the invention, reference being bad to the appended claims.

The invention claimed is:

1. A device for visually demonstrating dynamic where the concentration is greatest, and at least a pair of smaller mass members for selective reception by the sockets.

2. A device as defined by claim 1 wherein the sockets on opposite sides are aligned with each other.

3. A device as defined by claim 2 wherein the aligned sockets comprise continuations of each other.

4. A device as defined by claim 3 wherein the sockets are of threaded type and identical and m; the smaller mass members are substantially identical and interchangeably receivable by the sockets.

5. A device for visually demonstrating dynamic and static unbalance and correction comprising a spindle adapted for hand gripping of the same, 'a circular appreciable mass structure having a diameter at least three times the maximum thickness of the mass, the mass having its greatest concentration at the periphery, rotatably mounted on said spindle, having a plurality of arculately spaced sockets in close proximity to the periphery thereof and where the concentration is greatest,

and at least a pair of smaller mass members for 4 selective reception by the sockets, each socket being of threaded type and each smaller mass member including a threaded, socket receivable stem.

6. A device for visually demonstrating dynamic and static unbalance and correction comprising a spindle adapted for hand gripping of the same, a circular appreciable mass structure having a diameter at least three times the maximum thickness of the mass, the mass having its greatest concentration at the periphery, rotatably mounted on said spindle, having a plurality of arcuately spaced sockets in close proximity to the periphery thereof and where the concentration is greatest, and at least a pair of smaller mass members for selective reception by the sockets, at least two of the sockets on each side being disposed in diametral relation.

7. A device as defined by claim 6 wherein the sockets on opposite sides are aligned with and comprise continuations of each other.

HENRY C. SCHILDMEIER.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 36,181 Trowbridge Aug. 12, 1862 811,678 Waters Feb. 6, 1906 1,171,172 Coppage Feb. 8, 1916 2,319,037 Castiglia May 11, 1943 2,341,443 Hunter Feb. 8, 1944 

